.back_head{
	width:90%;
	height:100%;
	margin-left:7%;
}

.back_header_left{
	float:left;
	height:30px;
	width:40%;
}

.back_header_left p{
	height:30px;
	font-family:"华文隶书";
	font-size:30px;
	line-height:30px;
	color:#438ccb;
}

.back_header_left #school{
	height:20px;
	font-size:20px;
	padding-left:150px;
}

.back_header_right{
	float:right;
	padding-top:20px;
	width:40%; 
	line-height:20px;
	text-align:right;
	color:#438ccb;
}

.back_current_user{
	color:#438ccb;
	text-decoration:underline;
}

.back_exit{
	color:red;
	cursor:pointer;
	text-decoration:none;
}